Roller printing machine, particularly for textiles



Dec.

15, 1964 KARL-HEINZ LIESSEM 3,161,128

ROLLER PRINTING MACHINE, PARTICULARLY FOR TEXTILES Filed Jan. 31, 1962 United States Patent 3 161 128 RQLLER rnmrnsn elacnnsn, raarrcnmnrr FUR TEXE'ELEE Karl-Heinz Liessem, IKrefeld, Germany, assignor to loll. Kleinewefers Siihne, Krefeld, Germany Filed .lan. 31, 11.962, Ser. No. l'ilhili ii Qlaims priority, application Germany Feb. 4, 19 61 (Ilaim. (Cl. ltllh-lllld) I The present invention relates to a roller printing ma chine, especially for textiles, and, more specifically, concerns an improvement in the heretofore known machines of this type for improving the design of the machine frame and the journalling of the printing roller.

With heretofore known designs of roller printing machines, especially for textiles, the printing rollers distributed over the circumference of the counter pressing roller, or impression cylinder, were journalled in hookshaped open coulisses or sliding blocks. This customary design of the machine frame which has been known for more than a hundred years is diflicult to machine and, due to the springiness of the hook-shaped end of said sliding block causes a yielding of the guiding surface. Furthermore, such machine frame is rather expensive to cast because due to the required stiffness, the frame has to be cast by hollow casting. The heavy diaphragm pressing cylinders mounted on the hook-shaped sliding blocks additionally increase the tendency to vibrate so that the machine frame is subjected to high stresses because only relatively small cross sections remain for the base portion, and requires a very careful and expensive machining.

In an effort to overcome these drawbacks it has been suggested to avoid the hook-shaped sliding blocks and to journal the printing rollers in cylindrical guiding bodies which slide in radial bores of the machine frarne. However, also this arrangement has various drawbacks. In particular, the journalling of the printing rollers is not vibration-free because the central point of the bearingis spaced from the guiding end of the cylindrical bores by at least the roller radius so that the printing roller shafts are not supported at their central portion. Furthermore, with this arrangement the machine frame has to be produced by hollow casting. Also the mounting of the pressing device in the guiding bores is diificult and expensive and due to the small diameter requires considerable actuating pressures.

it is, therefore, an object of the present invention to provide a roller printing machine, especially for textiles, which will overcome the above mentioned drawbacks.

It is a further object of this invention to provide a rollerprinting machine which will be characterized by a low specific surface pressure and also is characterized in that a yielding of the sliding surfaces will be avoided.

It is another object of this invention to provide a roller printing machine which will make possible a high precision fit of the pattern register.

These and other objects and advantages of the invention will appear more clearly from the following specification in connection with the accompanying drawing, in which:

FIG. 1 illustrates in side view the left half of an eightroller printing machine according to the invention.

FIG. 2- is a cross section taken along the line ll-ll of FIG.1.

The roller printing machine according to the present invention is characterized primarily in that the bearing supports of the printing rollers are guided in short open forkshaped coulisses or'sliding blocks cast onto the machine frame, while pneumatic or hydraulic cylinders connected to the printing roller bearings are arranged radially on sliding blocks 8 consist of ribs 8. having a relatively wide surface, which are stiffened in the central portion by a transverse rib 9 Due to the fact that the sliding blocks have wide plane sliding surfaces arranged symmetrically with regard to the central portion of the bearing of the printing rollers, a specifically low surface pressure is obtained by means of which a yielding of the sliding surfaces will be prevented. This in turn brings about the advantage that the pattern can be registered at high precision. The shafts of the printing rollers 4 are journalled in bearings which are mounted in bearing supports 6, said supports 6 are by means of cylinder '7 on the inner side of the frame pulled in the direction of the machine axis against the counter pressing, or impression, cylinder 2. The construction of the printing rollers is furthermore simplified by the fact that in the bearing blocks there are provided flap bearing lids which can be opened and permit the removal of the printing rollers in radial direction whereby the setting time will be materially shortened.

in order that the machine frame, which according to a furth r development of the invention does not have to a, be produced by hollow casting, will obtain the required stiffness, the cross section of the machine frame is so profiled that coaxial ribs in and ill (FIG. 2) will be formed. In addition thereto, radial reinforcing ribs may be provided.

It is, of course, to be understood that the present invention is, by no means, limited to the particular construction shown in the drawing but also comprises any modification within the scope of the appended claim.

What I claim is:

A roller printing machine, especially for textiles, which comprises: a machine frame, an impression cylinder rotatably supported by said machine frame, a plurality of circumferentially spaced printing rollers arranged parallel to and adjacent the periphery of said impression cylinder,

individual bearing supports for said rollers having said rollers journalled therein, a plurality of circumferentially spaced radially outwardly opening U-shaped guiding means formed as an integral part of said machine frame and each including spaced parallel flat guide surfaces on opposite sides thereof extending radially of said impression cylinder, said bearing supports including spaced parallel flat surfaces on opposite sides thereof, said guide surfaces slidably engaging said flat surfaces of said bearing supports and supporting and guiding said bearing supports, and a fluid operable cylinder piston means for each bearing support connected at one end to said machine frame and having movable means at the other end operatively connected to the pertaining said bearing support for subjecting the same and thereby the roller journalled therein to movement in the pertaining guiding means in radial direction of said impression cylinder, said bearing supports being open toward the outside and including bearing lid-s hingedly connected to said bearing supports so as to be tiltable away therefrom, each said cylinder piston means extending from the respective bearing support toward the axis of said impression cylinder and the connection of each cylinder piston meanswith said framebeing located between the axis of said impression cylinder and the axis of the respective printing roller.

References (Jilted in the file of this patent UNITED STATES PATENTS 2,208,688 Stevens July 23, 1940 2,774,301 Worthington Dec. 18, 1956 2,s70,7es Urban Jan. 27, 1959 2,966,846 Lime Jan. 3, 1961 FOREIGN PATENTS 15,791 Great Britain Dec. 23,1885 1,232,547

Bddldfzd France Oct. 10, 1960 

